1 files changed, 22 insertions, 2 deletions
diff --git a/Tools/clinic/clinic.py b/Tools/clinic/clinic.py
index b704b5a..e7c7eb4 100755
--- a/Tools/clinic/clinic.py
+++ b/Tools/clinic/clinic.py
@@ -2556,9 +2556,29 @@ class char_converter(CConverter):
     format_unit = 'c'
     c_ignored_default = "'\0'"
 
+    # characters which need to be escaped in C code
+    _escapes = {x: r'\%d' % x for x in range(7)}
+    _escapes.update({
+        0x07: r'\a',
+        0x08: r'\b',
+        0x09: r'\t',
+        0x0A: r'\n',
+        0x0B: r'\v',
+        0x0C: r'\f',
+        0x0D: r'\r',
+        0x22: r'\"',
+        0x27: r'\'',
+        0x3F: r'\?',
+        0x5C: r'\\',
+    })
+
     def converter_init(self):
-        if isinstance(self.default, self.default_type) and (len(self.default) != 1):
-            fail("char_converter: illegal default value " + repr(self.default))
+        if isinstance(self.default, self.default_type):
+            if len(self.default) != 1:
+                fail("char_converter: illegal default value " + repr(self.default))
+
+            c_ord = self.default[0]
+            self.c_default = "'%s'" % self._escapes.get(c_ord, chr(c_ord))
 
 
 @add_legacy_c_converter('B', bitwise=True)